| |
Adjusted prevalence (%) [95% CI]
| |
---|
| |
ISAYA (1998/2000)
|
GEIRD (2007/2010)
|
p-value‡
|
---|
Gender*
|
Males
|
12.3 [12.0−12.6]
|
12.6 [11.8−13.4]
|
0.575
|
|
Females
|
12.6 [11.9−13.3]
|
12.7 [11.3−14.3]
|
0.920
|
Age†
|
<30 years
|
11.8 [11.2−12.5]
|
12.2 [10.9−13.6]
|
0.577
|
|
≥30 years
|
12.7 [12.2−13.2]
|
12.9 [12.0−13.8]
|
0.692
|
TOTAL¶
| |
12.5 [12.1−12.9]
|
12.6 [11.7−13.7]
|
0.781
|
- * prevalence obtained by stratifying on gender and adjusted for age, season of response, type of contact, cumulative response rate, and centre.
- † prevalence obtained by stratifying on age and adjusted for gender, season of response, type of contact, cumulative response rate, and centre.
- ¶ prevalence adjusted for gender, age, season of response, type of contact, cumulative response rate, and centre.
- ‡ p-value obtained by testing the null hypothesis that the regression coefficient of the dummy indicator of the study (GEIRD vs ISAYA) was zero.